1Standard: ASME B16.9,ASTM B363,DIN 2.Material: Gr1,Gr2, ... Gr5,Gr7,Gr9,Gr12,Gr23 3. Standard:ASTM B336,ASTM B337,ASTM B861,ASTM B862,ANSI B16.9 4. Size: ... Strength 3) No Dust 4)Anti-acid Corrosion12.Chemical composition: Element Composition,% Grade1Grade2Grade3Grade4Grade5Grade6Grade7Grade9Grade11Grade12N max0.030.030.050.050.050.030. ... -4.5 2.0-3.0 ASTM B363 90 Degree Titanium Elbow for Chemical Use